Universität zu Köln

Vermeulen, Jasper P., Hanika, Katharina ORCID: 0000-0003-0336-3985, Thomma, Bart P. H. J., Bai, Yuling and Schouten, Henk J. (2022). Scarcity of major resistance genes against Verticillium wilt caused by Verticillium dahliae. Plant Breed., 141 (5). S. 681 - 695. HOBOKEN: WILEY. ISSN 1439-0523

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Abstract

Verticillium dahliae is a soil-borne fungal pathogen that causes vascular wilt disease in numerous plant species. The only described qualitative resistances against V. dahliae are the Ve1 gene and the V2 locus in tomato. These resistances have been overcome by virulent strains. We tried to identify additional resistances. Out of the methods we tested, comparing the canopy area of V. dahliae-inoculated plants with mock-inoculated plants yielded the best discriminative power in resistance tests. Out of six wild tomato accessions that were previously reported to possess some resistance, Solanum pimpinellifolium G1.1596 and Solanum cheesmanii G1.1615 displayed the lowest stunting and the least colonization by V. dahliae. Recombinant inbred line (RIL) populations were developed of both populations. No QTLs were identified in the G1.1596 RIL population. In the G1.1615 population, four small-effect QTLs were associated with reduced stunting. Many studies in other hosts also failed to discover major resistance genes against V. dahliae. We hypothesize that the scarcity of major resistance genes against V. dahliae is caused by its endophytic behaviour in nature. The limited damage in nature would not lead to evolutionary pressure to evolve major resistances. However, in agriculture, V. dahliae can behave more pathogenic, leading to serious damage.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Vermeulen, Jasper P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hanika, Katharina UNSPECIFIED orcid.org/0000-0003-0336-3985 UNSPECIFIED Thomma, Bart P. H. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bai, Yuling UNSPECIFIED UNSPECIFIED UNSPECIFIED Schouten, Henk J. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-668137
DOI:	10.1111/pbr.13046
Journal or Publication Title:	Plant Breed.
Volume:	141
Number:	5
Page Range:	S. 681 - 695
Date:	2022
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1439-0523
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language QUANTITATIVE TRAIT LOCI; FUNGAL PATHOGENS; TOMATO; PLANT; PCR Multiple languages Agronomy; Biotechnology & Applied Microbiology; Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66813